Explanation
It is mainly composed of cryptocrystalline - phanerocrystalline quartze, and a small amount of mica minerals, chlorite, limonite, hematite, goethite, clay mineral, etc. It can contain small amounts of elements such as Ca, Mg, Fe, Mn, Ni, Al, Ti, V, etc. Granular, fibrous and aphanitic texture; Block like, block like, strip like, shell like, and bell shaped structures. When pure, it is colorless and can present different colors when containing different trace elements or mixed with other colored minerals. Commonly seen are white, green, gray, yellow, brown, orange red, blue, etc. It can be divided into cryptocrystalline quartz jade (chalcedony, agate), phanerocrystalline quartz jade (quartzite, aventurine quartz), and jade replaced by silica (wood metamorphic stone, tiger'S eye).
Classification
Natural materials and products -> Mineral materials